Disable apollo client metric headers

An apollographql-client-version was constantly added to my graphql requests towards the github graphql endpoint.

I solved it by setting clientAwareness to false. Without this the github api request was denied by CORS. Browser simply dropped the request with an error:

"Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.github.com/graphql. (Reason: header ‘apollographql-client-version’ is not allowed according to header ‘Access-Control-Allow-Headers’ from CORS preflight response)."

Example code for the solution:

const authMiddleware = new ApolloLink((operation, forward) => {
  const token = localStorage.getItem('token');

  operation.setContext(() => {
    return {
      /* 👇 This is needed in order to disable the metrics apollo client headers */
      clientAwareness: false,
      headers: {
        Authorization: `bearer ${token}`,
      },
    };
  });

  return forward(operation);
});

// And then providing it into your module providers like so:
providers: [
  {
    provide: APOLLO_OPTIONS,
    useFactory: (httpLink: HttpLink) => {
      return new ApolloClient({
        cache: new InMemoryCache(),
        link: concat(
          authMiddleware,
          httpLink.create({ uri: environment.apiUrl })
        ),
      });
    },
    deps: [HttpLink],
  },
],

This finally removed my metric headers from the requests 😉